Mattress



FIG. 1 is a top end perspective view of a mattress in accordance withthe new design;

FIG. 2 is a top opposite end perspective view of the mattressillustrated in FIG. 1;

FIG. 3 is an end elevational view of the mattress illustrated in FIG. 1,the opposite end is identical;

FIG. 4 is a left side elevational view of the mattress illustrated inFIG. 1;

FIG. 5 is a right side elevational view of the mattress illustrated inFIG. 1;

FIG. 6 is a top plan view of the mattress illustrated in FIG. 1;

FIG. 7 is a bottom plan view of the mattress illustrated in FIG. 1; and,

FIG. 8 is a cross-sectional view taken from line ‘8-8’ in FIG. 6.

Any broken line illustration of environmental structure in the drawingis not part of the design sought to be patented.

CLAIM The ornamental design for a mattress, as shown and described.